Ver:
·
Criptografía
de clave secreta
·
https://www.cosic.esat.kuleuven.be/nessie/
·
http://en.wikipedia.org/wiki/SHACAL
Algoritmo de
cifra basado en un secreto compartido (clave). Cifra el texto en bloques de
128-512 bits. Utiliza claves de 160 (SHACAL-1) o 256 bits (SHACAL-2).
In cryptography, SHACAL-1
and SHACAL-2 are block ciphers based on cryptographic hash functions from the
SHA family. They were designed by Helena Handschuh and David Naccache of the
smart card manufacturer Gemplus.
SHACAL-1 (originally simply
SHACAL) is a 160-bit block cipher based on SHA-1, and supports keys from
128-bit to 512-bit. SHACAL-2 is a 256-bit block cipher based upon the larger
hash function SHA-256.
http://en.wikipedia.org/wiki/SHACAL-2